EQUIPMENT MAINTENANCE & TESTING
|
Examination
at regular intervals
A thorough examination of the chain slings
should be carried out by a competent person at
intervals in accordance with national legal
requirements, but not exceeding twelve months. |
This interval should be less where deemed
necessary in the light of service conditions.
Recommendation in Germany is the electromagnetic crack test. |
| |
Visual testing
Reveal any exterior defects, such
as bent chain links, twisted chain links, or chain
links with notches. Examination of the components, correct fitting as well as completeness and
efficiency of safety devices. |
 |
| |
Examination of wear and lengthening
1. Examine wear of diameter
2. Examine plastic elongation caused by overloding
3. Examine pitch elongation due to wear in the diameter |
 |
| |
Lifting Accessories
Lifting hooks must be replaced when
the opening of the mouth is deformed more than
10%, and also if the hook is worn more than 5%,
or if it shows deep notches. Maximum permitted
wear of V-Bolt diam.—10%. Same applies for lateral
bending of the hook. When exchanging components use new load and retaining pins. |
 |
| |
Do not use chains over sharp edges.
Sharp edge: radius of edges < chain diam. |
20% reduction in capacity, otherwise use
next larger chain, or use edqe protection |
| |
Chains must be free of knots |
Use appropriate shortening component |
| |
Do not use twisted chains |
Use a swivel or shortening component |
| |
Master links must be moveable in the
crane hook |
Therefore use special master links in
special dimensions VSAK |
| |
Unsymmetrical Load
In case of unsymmetrical load, pay attention
to reduced WLL |
|
| |
Temperature
Consider possible influence of temperature |
It is reasonable to use special hooks,
which are designed according standards |
| |
Avoid shock loading |
If this is not possible, use next larger
chain diam. |
| |
| We do not assume responsibility for damage, caused by ignoring the standards specications and instructions mentioned above. |
